All Of the steps that you had me do were done correctly. I didn’t have trouble with any of the steps. The images are the correct size. The slider was recreated as slider2. The main slider still does not work when you press the arrow- it doesn’t do anything. I can reorder the slides and a different image will be on the main page, but it won’t move either manually or automatically.
I have tried this. The first thing that I did was to uninstall or deactivate all of the plug-ins that I was using. This did not work. I also tried your suggestion about creating a new slider and reinserting the images into the new slider. It still does not work. The problem is that you can even press the arrow and it will not advance to the next image. Another similar problem is that when the theme is responsive and mobile mode you cannot click the menu at the top and get anything to happen.
I have no idea, but I had installed a plug-in it was supposed to improve performance it might have made a change. I’ve since gotten rid of all the plug-ins except for an SEO plug-in. So how do I make that script work again?